The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1982
Filed:
Mar. 07, 1980
Applicant:
Inventors:
Dietmar Bege, Erlangen, DE;
Anwer Puthawala, Erlangen-Buckenhof, DE;
Assignee:
Kraftwerk Union AG, Mulheim, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; B08B / ; B08B / ;
U.S. Cl.
CPC ...
134 10 ; 134 / ; 134 26 ; 134 40 ; 252633 ;
Abstract
Mixing devices such as worm machines used for embedding radioactive wastes in hot bitumen are cleaned to remove residual bitumen and salt incrustations in three successive operations: (a) Washing with a solvent for bitumen in a volume amount equal to about the free space of the device. (b) Rinsing with a water-soluble rinsing medium miscible with the solvent in a volume amount the same as (a). (c) Rinsing with demineralized water in a volume amount twice (b). Pumice gravel is used to absorb the solvent and rinsing medium and the resultant pumice embedded in bitumen and sent to ultimate storage.